Today I restarted ZCS but did not see any changes: zimlet remains without specified icon, double-clicking on zimlet expands user properties window having old control which was removed from XML declaration.

I have checked it a bit more and it appears to be a browser problem.
I have the following setting:

On the zimlet panel I have three zimlets:
1. the standard Yahoo local zimlet
2. I installed the SMS zimlet as an example and test
3. My own zimlet

The following happens in Firefox (v. 2 on windows and v3beta5 on Ubuntu):
When I deploy my zimlet normally with the Zimbra admin as a zip, I do get an icon for 1 and 2 but not for 3
When I deploy my zimlet in the _dev directory I get an icon for 1 and 3 but not for 2!!!

When we check this with Internet Explorer on windows all icons show up correctly!
I have tried to see what happens with the page info and the available resources, but this is a lost case with all the ajax code loading stuff.

Does anybody know what is going on, does FF have problems with the style definitions for the icons??